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shigemk2/elem.hs

Created February 4, 2015 11:58
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elem.hs
elem' :: (Eq a) => a -> [a] -> Bool
elem' y ys = foldr (\x acc -> if x == y then True else acc) False ys
main = do
print $ elem' 4 [1,2,3]
print $ elem' 3 [1,2,3]
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